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Manipulation of light signaling and nitric oxide metabolism as a means of improving tomato quality traits

Grant number: 18/16389-8
Support type:Regular Research Grants
Duration: December 01, 2018 - May 31, 2021
Field of knowledge:Biological Sciences - Botany - Pant Physiology
Principal researcher:Luciano Freschi
Grantee:Luciano Freschi
Home Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil


Fleshy fruit growth and ripening are under strict developmental, hormonal and epigenetic regulation, which in turn are fine-tuned by a plethora of environmental stimuli. Among environmental cues, light plays a significant role in determining fruit growth, pigmentation and timing of ripening. In tomato (Solanum lycopersicum), a major model species for fleshy fruits and leading vegetable crop, several lines of evidence indicate that changes in phytochrome(PHY)-dependent light perception and signaling can lead to significant alterations in fruit development and quality traits. Similarly, recent studies implicate the free radical nitric oxide (NO) as a key regulatory signal controlling fruit metabolism and ripening. Therefore, by applying functional genomic, biochemical and physiological approaches, this project aims to investigate the impacts of manipulating light perception and signal transduction as well as NO metabolism on tomato fruit biology. The specific role played by fruit-localized phytochromes and their downstream signaling cascades on regulating biochemical and developmental processes that directly impact major features of tomato fruit nutritional quality will be investigate both in an isolated or combined manner. Moreover, genes, proteins and metabolic processes controlled by NO during tomato ripening will be identified under both optional and stressful environmental conditions via both genetic and pharmacological approaches. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
RODRIGUES ALVES, FREDERICO ROCHA; LIRA, BRUNO SILVESTRE; PIKART, FILIPE CHRISTIAN; MONTEIRO, SCARLET SANTOS; FURLAN, CLAUDIA MARIA; PURGATTO, EDUARDO; PASCOAL, GRAZIELI BENEDETTI; SILVA ANDRADE, SONIA CRISTINA; DEMARCO, DIEGO; ROSSI, MAGDALENA; FRESCHI, LUCIANO. Beyond the limits of photoperception: constitutively active PHYTOCHROME B2 overexpression as a means of improving fruit nutritional quality in tomato. Plant Biotechnology Journal, v. 18, n. 10 APR 2020. Web of Science Citations: 3.
PALMA, JOSE M.; FRESCHI, LUCIANO; RODRIGUEZ-RUIZ, MARTA; GONZALEZ-GORDO, SALVADOR; CORPAS, FRANCISCO J. Nitric oxide in the physiology and quality of fleshy fruits. Journal of Experimental Botany, v. 70, n. 17, SI, p. 4405-4417, SEP 1 2019. Web of Science Citations: 1.
KOLBERT, ZSUZSANNA; FEIGL, GABOR; FRESCHI, LUCIANO; POOR, PETER. Gasotransmitters in Action: Nitric Oxide-Ethylene Crosstalk during Plant Growth and Abiotic Stress Responses. ANTIOXIDANTS, v. 8, n. 6 JUN 2019. Web of Science Citations: 2.

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